WO2021042419A1 - Pâte pour grilles fines avant de cellule solaire de type n et son procédé de préparation - Google Patents

Pâte pour grilles fines avant de cellule solaire de type n et son procédé de préparation Download PDF

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Publication number
WO2021042419A1
WO2021042419A1 PCT/CN2019/106899 CN2019106899W WO2021042419A1 WO 2021042419 A1 WO2021042419 A1 WO 2021042419A1 CN 2019106899 W CN2019106899 W CN 2019106899W WO 2021042419 A1 WO2021042419 A1 WO 2021042419A1
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parts
solar cell
type solar
aluminum
silicon
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PCT/CN2019/106899
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English (en)
Chinese (zh)
Inventor
朱鹏
刘媛
刘梦雪
王叶青
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南通天盛新能源股份有限公司
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Priority to EP19917532.4A priority Critical patent/EP3813080A4/fr
Priority to US17/260,229 priority patent/US20220238249A1/en
Publication of WO2021042419A1 publication Critical patent/WO2021042419A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00—Powdered glass; Bead compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
    • C03C3/074—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc
    • C03C3/0745—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc containing more than 50% lead oxide, by weight
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
    • C03C8/10—Frit compositions, i.e. in a powdered or comminuted form containing lead
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
    • C03C8/16—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions with vehicle or suspending agents, e.g. slip
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
    • C03C8/18—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions containing free metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/14—Conductive material dispersed in non-conductive inorganic material
    • H01B1/16—Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof

Definitions

  • the invention relates to the field of polymer-based conductive materials, in particular to an N-type solar cell front fine grid paste and a preparation method thereof.
  • N-type solar cells have the advantages of high conversion rate, low light-induced decay, good stability, and high cost performance. They are gradually attracting attention in the market. At the same time, N-type solar cells are still It has the advantages of double-sided power generation, suitable for building integration and vertical installation, and its application in the market is more and more favored by consumers.
  • N-type solar cells increase process difficulty and production cost while obtaining high efficiency, so their promotion is subject to certain restrictions.
  • the most common N-type solar cell structure is that the front side is a p + doped layer, the substrate is N-type silicon, and the back side is an n + doped layer.
  • the cell metallization generally adopts a double-sided H-type metal gate line structure, and the p + side Printing aluminum-doped silver paste, n + side printing silver paste.
  • aluminum-doped silver paste is used on the front side, the solderability can be improved, but the presence of silver-aluminum spikes will increase the recombination of solar cells. If aluminum paste is used, it will cause the grid to be more active and have a lower melting point.
  • the line is not smooth, and aluminum beads or aluminum cladding appear.
  • most of the processes for printing fine grids in the prior art are first slotting and then printing.
  • Chinese patents CN201510207047.X and CN105742378A Even if this type of process is used, not only the process is complicated, but also the passivation layer is damaged. In the case of laser grooving, it is necessary to increase the process equipment and increase the production cost. If aluminum paste can be used on the front of the N-type solar cell to replace the aluminum-doped silver paste printed fine grid, the production cost of the N-type solar cell can be greatly reduced, which is beneficial to its mass promotion in the market.
  • the first aspect of the present invention provides an N-type solar cell front fine grid paste.
  • the preparation raw materials include 1 to 5 parts of high activity glass powder, 1 to 5 parts of silicon powder, 75-79 parts of aluminum-silicon alloy powder and 15-20 parts of organic ingredients.
  • the raw materials for preparing the highly active glass powder include 5-20 parts of boric acid, 45-70 parts of lead oxide, 0-10 parts of lithium carbonate, 2-15 parts of zinc oxide, 0-10 parts of antimony trioxide, 5-30 parts of cesium carbonate, 1-10 parts of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 12-20 wt%.
  • the median particle diameter of the highly active glass powder is 50-100 nanometers
  • the median particle diameter of silicon powder is 50-100 nanometers
  • the median particle diameter of aluminum-silicon alloy powder is 1-100 nanometers. 3 microns.
  • the raw materials for preparing the organic components include 3 to 5 parts of organic resin, 1 to 3 parts of binder, 2 to 4 parts of thixotropic agent, and 1 to 3 parts of dispersant. , 5-8 parts of solvent.
  • the organic resin is selected from a mixture of one or more of acrylic resin, ethylene-vinyl acetate resin, alkyd resin, amino resin, and epoxy resin.
  • the binder is selected from a mixture of one or more of ethyl cellulose, methyl cellulose, and butyl cellulose.
  • the thixotropic agent is selected from a mixture of one or more of polyamide wax, hydrogenated castor oil, fumed silica, and organic bentonite.
  • the dispersant is selected from one of oleic acid, stearic acid, polyethylene glycol, tallow propylene diamine oleate, dimethyl adipate, and phosphate triester Or a mixture of multiple.
  • the second aspect of the present invention provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which includes the following steps: after the organic components are uniformly mixed to obtain an organic mixture, high activity glass powder is added to the organic mixture Disperse and mix with silicon powder evenly, then add aluminum-silicon alloy powder to continue to disperse and mix. After mixing, grind in a three-roller to obtain.
  • An N-type solar cell front fine grid paste provided by the present invention and its preparation method use aluminum paste to replace the aluminum-doped silver paste in the prior art, which reduces the production cost of N-type solar cells, and the aluminum paste contains
  • the high-active glass powder eliminates the slotting process before printing, simplifies the process steps, and does not cause damage to the passivation layer, which improves the electrical performance of the solar cell.
  • the present invention provides an N-type solar cell front fine grid paste.
  • the technical difficulty in preparing the N-type solar cell front fine grid paste is: the burn-through aluminum paste burns through the N-type solar cell On the front side, it is difficult to form good contact while ensuring uniform firing.
  • the present invention solves this difficulty: using high-active glass powder in the formulation for burning through, while also adding 1 to 5 parts of silicon to the formulation. Powder, in the burn-through aluminum paste, silicon powder is adsorbed on the surface of the aluminum paste to prevent further reaction between the aluminum paste and the silicon substrate, making the sintering more uniform. And by adding silicon powder, the content of silicon in the aluminum-silicon alloy powder increases, which increases the melting point of the aluminum-silicon alloy powder, thereby reducing the corrosion effect on the silicon base.
  • the first aspect of the present invention provides an N-type solar cell front fine grid paste.
  • the preparation raw materials include 1 to 5 parts of high activity glass powder, 1 to 5 parts of silicon powder, 75-79 parts of aluminum-silicon alloy powder and 15-20 parts of organic ingredients.
  • the raw materials for preparing the fine grid paste on the front side of the N-type solar cell include 2 to 4 parts of high activity glass powder, 2 to 4 parts of silicon powder, and 77 to 4 parts of aluminum silicon alloy powder. 79 parts, 16-19 parts of organic ingredients.
  • the content of Al-Si alloy powder is less than 75wt%, the viscosity of the front fine grid paste prepared will be too large, and the shape of the front fine grid paste will be poor, resulting in wide grid lines and large shading area during printing. The conversion efficiency is low. If the content of the Al-Si alloy powder is higher than 79wt%, the solid content of the prepared front fine grid paste will increase, resulting in poor printability.
  • the raw materials for preparing the N-type solar cell front fine grid paste include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components. Copies.
  • glass powder can etch the oxide layer on the surface of the aluminum powder during the high-temperature sintering process, and drive the aluminum powder particles to align and adhere to the surface of the solar cell to form a dense conductive layer.
  • the raw materials for preparing the highly active glass powder include 5-20 parts of boric acid, 45-70 parts of lead oxide, 0-10 parts of lithium carbonate, 2-15 parts of zinc oxide, 0-10 parts of antimony trioxide, 5-30 parts of cesium carbonate, 1-10 parts of silicon dioxide.
  • the raw materials for preparing the highly active glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, and carbonic acid. 18 parts of cesium and 6 parts of silicon dioxide.
  • the preparation method of the highly active glass powder in this application is not particularly limited, and it can be any one well known to those skilled in the art.
  • the mixed inorganic materials are completely melted into molten glass in a high-temperature furnace, and then the molten glass is poured into a roller.
  • the rolling mill makes glass flakes, and then the glass flakes are put into a ball mill and crushed into glass powder.
  • the median particle size of the highly active glass powder is 50-100 nanometers; further preferably, the median particle size of the highly active glass powder is 80 nanometers.
  • the use of high-active glass powder can react with the anti-reflection layer, and it is not necessary to use the conventional process of first opening and then printing on the surface of the anti-reflection layer, which avoids the impact of openings on polycrystalline silicon wafers.
  • the damage also greatly simplifies the process and reduces the cost.
  • the lead oxide in the high-activity glass powder will react with silicon nitride, penetrating the passivation film, and allowing the aluminum powder to penetrate into It also forms a good contact with the silicon wafer, which reduces the contact resistance between the fine grid and the silicon wafer.
  • the silicon dioxide generated by the reaction can be added into the glass powder to further assist the arrangement and adhesion of the aluminum powder on the surface of the battery;
  • Silicon powder is silica with extremely small particle size, and its synergistic effect with glass powder can appropriately lower the sintering temperature during the high-temperature sintering process, reduce the sintering time and improve the sintering efficiency.
  • silicon powder is adsorbed on the surface of the aluminum paste, preventing further reaction of the aluminum paste with the silicon substrate, and making the sintering more uniform.
  • the content of silicon in the aluminum-silicon alloy powder increases, which increases the melting point of the aluminum-silicon alloy powder, thereby reducing the corrosion effect on the silicon base.
  • the median particle size of the silicon powder is 50-100 nanometers; further preferably, the median particle size of the silicon powder is 80 nanometers.
  • the aluminum-silicon alloy powder provides metal aluminum for the aluminum paste of the thin grid on the front of the solar cell, and gives the thin grid the role of conduction and current collection. Due to the existence of silicon, the compatibility with the surface of the solar cell is improved and the adhesion is increased.
  • the silicon content in the aluminum-silicon alloy powder is 12-20 wt%; further preferably, the silicon content in the aluminum-silicon alloy powder is 15 wt%.
  • the median particle size of the aluminum-silicon alloy powder is 1 to 3 microns; further preferably, the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the particle size of the Al-Si alloy powder is less than 1 ⁇ m, safety problems are likely to occur during the production process, and the explosion probability increases.
  • the particle size of the Al-Si alloy powder is greater than 3 ⁇ m, the Al-Si alloy powder and the silicon substrate The contact gap is large and the contact is uneven, resulting in large contact resistivity and increased local recombination.
  • the weight ratio of the high-activity glass powder, silicon powder, and aluminum-silicon alloy powder is 1:(0.5 ⁇ 1.5):(25-27); further preferably, the high-activity glass powder The weight ratio of silicon powder and aluminum silicon alloy powder is 1:1:26.
  • silicon powder is a supplement to the silicon dioxide in the glass powder, which improves the efficiency in the sintering step; aluminum silicon
  • the alloy powder infiltrates the passivation layer with the assistance of high-activity glass powder and silicon powder to contact the silicon wafer, and due to the presence of silicon in the alloy, the contact between the aluminum powder during the sintering process is reduced, that is, the appearance of aluminum bead phenomenon is reduced.
  • the preparation process reduces energy consumption and cost.
  • the amount of silicon powder is too much, the corrosion effect of aluminum paste on the passivation layer is reduced, and the contact between aluminum powder and silicon wafer is poor, and the contact resistance increases, which reduces the electric conversion efficiency of the battery.
  • the organic components are used as the carrier of the slurry, so that the aluminum powder and other solid substances are uniformly dispersed in it, and can be stored stably, and a high-performance fine grid can be obtained during the printing process.
  • the raw materials for preparing the organic components include 3 to 5 parts of organic resin, 1 to 3 parts of binder, 2 to 4 parts of thixotropic agent, and 1 to 3 parts of dispersant. , 5-8 parts of solvent; further preferably, the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is selected from a mixture of one or more of acrylic resin, ethylene-vinyl acetate resin, alkyd resin, amino resin, and epoxy resin; further preferably, the organic resin The resin is acrylic resin.
  • the acrylic resin is an acrylic resin solution with a mass concentration of 25 to 35%, and the solvent is terpineol; further preferably, the acrylic resin is an acrylic resin solution with a mass concentration of 30%, The solvent is terpineol.
  • the binder is selected from a mixture of one or more of ethyl cellulose, methyl cellulose, and butyl cellulose; further preferably, the binder is ethyl cellulose, methyl cellulose, and butyl cellulose. Base cellulose.
  • the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, and the solvent is terpineol.
  • the weight ratio of the STD-type ethyl cellulose solution and the N-type ethyl cellulose solution is 1:1.
  • the mass concentration of the STD-type ethyl cellulose solution is 15-25%, and the mass concentration of the N-type ethyl cellulose solution is 25-35%; further preferably, the STD-type ethyl cellulose solution The mass concentration of the ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%.
  • the relative molecular weight of the STD ethyl cellulose is 2000-5000; further preferably, the relative molecular weight of the STD ethyl cellulose is 3000.
  • the relative molecular weight of the N-type ethyl cellulose is 500-2000; further preferably, the relative molecular weight of the N-type ethyl cellulose is 1,000.
  • the STD-type ethyl cellulose in this application is produced by Dow with the brand name STD10; the N-type ethyl cellulose is produced by Ashland with the brand name N4.
  • the thixotropic agent is selected from a mixture of one or more of polyamide wax, hydrogenated castor oil, fumed silica, and organic bentonite; further preferably, the thixotropic agent is Polyamide wax.
  • the polyamide wax is a polyamide wax solution with a mass concentration of 10-20%, and the solvent is terpineol; further preferably, the polyamide wax is a polyamide wax with a mass concentration of 15%. Solution, the solvent is terpineol.
  • the dispersant is selected from one of oleic acid, stearic acid, polyethylene glycol, tallow propylene diamine oleate, dimethyl adipate, and phosphate triester Or a mixture of multiple; further preferably, the dispersant is a mixture of oleic acid and tallow propylene diamine oleate.
  • the weight ratio of oleic acid to tallow propylene diamine oleate is 1:3.
  • the solvent is selected from one or more of butyl carbitol, terpineol, ethylene glycol ethyl ether acetate, diethylene glycol methyl ethyl ether, and ethylene glycol dimethyl ether Further preferably, the solvent is butyl carbitol.
  • the neutral shape is stable, no delamination occurs, and high-performance fine grids can be produced in the subsequent printing steps.
  • the organic phase in the aluminum paste volatilizes or decomposes, leaving the internal aluminum powder densely arranged and attached to the solar surface Tight fine grid.
  • the second aspect of the present invention provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which includes the following steps: after the organic components are uniformly mixed to obtain an organic mixture, high-activity glass powder is added to the organic mixture Disperse and mix with silicon powder evenly, then add aluminum-silicon alloy powder to continue to disperse and mix. After mixing, grind in a three-roller to obtain.
  • the method for preparing the fine grid paste on the front side of the N-type solar cell includes the following steps: uniformly mixing organic components to obtain an organic mixture, and then dispersing the organic mixture at 400-600 rpm for 5-15 seconds , 900 ⁇ 1100rmp dispersion for 100 ⁇ 120s, add high activity glass powder and silicon powder and disperse at 400 ⁇ 600rmp rotation speed for 5 ⁇ 15s, 900 ⁇ 1100rmp dispersion for 100 ⁇ 120s, then add aluminum silicon alloy powder and disperse at 400 ⁇ 600rpm rotation speed 5 ⁇ 15s, 900 ⁇ 1100rmp dispersion for 100 ⁇ 120s, after the dispersion is finished, grind 2 ⁇ 5 times in a three-roll machine.
  • the method for preparing the fine grid paste on the front side of the N-type solar cell includes the following steps: uniformly mixing organic components to obtain an organic mixture, and then dispersing the organic mixture at 500 rpm for 10 s, and 1000 rpm for 110 s. , Add high-active glass powder and silicon powder and disperse at 500rpm for 10s, 1000rpm for 110s, and then add aluminum-silicon alloy powder at 500rpm for 10s, 1000rpm for 110s, and grind 4 times in a three-roller after dispersion.
  • Example 1 provides an N-type solar cell front fine grid paste. Based on parts by weight, the raw materials for preparation include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, and 6 parts of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 15 wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which includes the following steps: mix the organic ingredients uniformly to obtain an organic mixture, and then disperse the organic mixture at 500 rpm for 10 seconds, 1000 rpm for 110 seconds, and add high activity Glass powder and silicon powder were dispersed at 500rpm for 10s, 1000rpm for 110s, and then aluminum-silicon alloy powder was added at 500rpm for 10s, 1000rmp for 110s, and after dispersion, they were ground 4 times in a three-roller.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, including the following steps: use the N-type solar cell front fine grid paste to print the fine grid on the front of the solar cell, and print the fine grid at 255°C after printing. Drying for 3 minutes, sintering at 650°C peak temperature for 10 seconds.
  • Example 2 provides an N-type solar cell front fine grid paste. Based on parts by weight, its preparation raw materials include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 5 parts of boric acid, 45 parts of lead oxide, 2 parts of zinc oxide, 5 parts of cesium carbonate, and 1 part of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 15 wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.
  • Example 3 provides an N-type solar cell front fine grid paste. Based on parts by weight, the raw materials for preparation include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 20 parts of boric acid, 70 parts of lead oxide, 10 parts of lithium carbonate, 15 parts of zinc oxide, 10 parts of antimony trioxide, 30 parts of cesium carbonate, and 10 parts of silicon dioxide. Copies.
  • the silicon content in the aluminum-silicon alloy powder is 15 wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.
  • Example 4 provides an N-type solar cell front fine grid paste. Based on parts by weight, its preparation raw materials include 1 part of high-activity glass powder, 1 part of silicon powder, 70 parts of aluminum-silicon alloy powder, and 15 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, and 6 parts of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 15 wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose
  • the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose The relative molecular weight is 1000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.
  • Example 5 provides an N-type solar cell front fine grid paste. Based on parts by weight, the raw materials for preparation include 5 parts of high-activity glass powder, 5 parts of silicon powder, 85 parts of aluminum-silicon alloy powder, and 20 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, and 6 parts of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 15 wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.
  • Example 6 provides an N-type solar cell front fine grid paste.
  • the raw materials for preparation include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, and 6 parts of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 15 wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for the preparation of the organic components include 3 parts of organic resin, 1 part of binder, 2 parts of thixotropic agent, 1 part of dispersant, and 5 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.
  • Example 7 provides an N-type solar cell front fine grid paste. Based on parts by weight, its preparation raw materials include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, and 6 parts of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 15 wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for preparing the organic components include 5 parts of organic resin, 3 parts of binder, 4 parts of thixotropic agent, 3 parts of dispersant, and 8 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.
  • Example 8 provides an N-type solar cell front fine grid paste.
  • its preparation raw materials include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum, and 18 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, and 6 parts of silicon dioxide.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of silicon powder is 80 nanometers
  • the median particle size of aluminum powder is 2 microns.
  • the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.
  • Example 9 provides an N-type solar cell front fine grid paste. Based on parts by weight, the preparation raw materials include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, and 6 parts of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 12wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.
  • Example 10 provides an N-type solar cell front fine grid paste. Based on parts by weight, the raw materials for preparation include 3 parts of high-activity glass powder, 3 parts of silicon powder, 78 parts of aluminum-silicon alloy powder, and 18 parts of organic components.
  • the raw materials for preparing the high-activity glass powder include 12 parts of boric acid, 58 parts of lead oxide, 5 parts of lithium carbonate, 8 parts of zinc oxide, 5 parts of antimony trioxide, 18 parts of cesium carbonate, and 6 parts of silicon dioxide.
  • the silicon content in the aluminum-silicon alloy powder is 20 wt%.
  • the median particle size of the highly active glass powder is 80 nanometers
  • the median particle size of the silicon powder is 80 nanometers
  • the median particle size of the aluminum-silicon alloy powder is 2 microns.
  • the raw materials for preparing the organic components include 4 parts of organic resin, 2 parts of binder, 3 parts of thixotropic agent, 2 parts of dispersant, and 6 parts of solvent.
  • the organic resin is an acrylic resin; the acrylic resin is an acrylic resin solution with a mass concentration of 30%, and the solvent is terpineol.
  • the binder is ethyl cellulose; the ethyl cellulose is a mixture of STD-type ethyl cellulose solution and N-type ethyl cellulose solution, the mass ratio is 1:1, and the solvent is terpineol;
  • the mass concentration of the STD-type ethyl cellulose solution is 20%, and the mass concentration of the N-type ethyl cellulose solution is 30%;
  • the relative molecular weight of the STD-type ethyl cellulose is 3000, and the N-type ethyl cellulose
  • the relative molecular weight of the element is 1,000.
  • the thixotropic agent is a polyamide wax; the polyamide wax is a polyamide wax solution with a mass concentration of 15%, and the solvent is terpineol.
  • the dispersant is a mixture of oleic acid and tallow propylene diamine oleate; the weight ratio of the oleic acid and tallow propylene diamine oleate is 1:3.
  • the solvent is butyl carbitol.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid paste, which is similar to Example 1.
  • This example also provides an N-type solar cell front fine grid, which is printed using the above-mentioned N-type solar cell front fine grid paste.
  • This example also provides a method for preparing the above-mentioned N-type solar cell front fine grid, which is similar to Embodiment 1.

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Abstract

L'invention concerne une pâte pour grilles fines avant de cellule solaire de type N, comprenant en parties en poids : 1 à 5 parties d'une poudre de verre à haute activité, 1 à 5 parties de poudre de silicium, 75 à 79 parties de poudre d'alliage d'aluminium et de silicium et 15 à 20 parties de composants organiques. La pâte pour grilles fines avant de cellule solaire de type N et son procédé de préparation font appel à une pâte d'aluminium en tant que substitution pour la pâte dopée à l'argent et à l'aluminium de l'état de la technique, ce qui permet de réduire le coût de production d'une cellule solaire de type N, d'éliminer un processus de rainurage avant l'impression en raison de la poudre de verre à haute activité contenue dans la pâte d'aluminium, de simplifier des étapes de traitement, sans endommager une couche de passivation, et d'améliorer les performances électriques de la cellule solaire.
PCT/CN2019/106899 2019-09-04 2019-09-20 Pâte pour grilles fines avant de cellule solaire de type n et son procédé de préparation WO2021042419A1 (fr)

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EP19917532.4A EP3813080A4 (fr) 2019-09-04 2019-09-20 Pâte pour grilles fines avant de cellule solaire de type n et son procédé de préparation
US17/260,229 US20220238249A1 (en) 2019-09-04 2019-09-20 Type of front finger paste for n-type solar cells as well as its preparation methods

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Publication number Priority date Publication date Assignee Title
CN113096846A (zh) * 2021-03-23 2021-07-09 华中科技大学 一种p型发射区欧姆接触银电极浆料
CN113096846B (zh) * 2021-03-23 2023-03-28 华中科技大学 一种p型发射区欧姆接触银电极浆料

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EP3813080A4 (fr) 2021-10-20
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CN110491545A (zh) 2019-11-22

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